services: fix memory leak in ColorFade

original patch from
   https://code.google.com/p/android/issues/detail?id=79729#c177

i can not get the email to add proper authorship, but all credits belong
to this person

Change-Id: Ica9a4ae02cd3c8435f46dd9c3bfdb52317f9a7ef
SystemUI: This TODO can be solved actually

Signed-off-by: BigBrother1984 <carlosavignano@aospa.co>